JP5919905B2 - 駆動装置、発光装置及び投影装置 - Google Patents

駆動装置、発光装置及び投影装置 Download PDF

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Publication number
JP5919905B2
JP5919905B2 JP2012055371A JP2012055371A JP5919905B2 JP 5919905 B2 JP5919905 B2 JP 5919905B2 JP 2012055371 A JP2012055371 A JP 2012055371A JP 2012055371 A JP2012055371 A JP 2012055371A JP 5919905 B2 JP5919905 B2 JP 5919905B2
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Japan
Prior art keywords
light emitting
emitting element
circuit
capacitor
load
Prior art date
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Application number
JP2012055371A
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English (en)
Japanese (ja)
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JP2013192309A (ja
JP2013192309A5 (enExample
Inventor
英男 鈴木
英男 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP2012055371A priority Critical patent/JP5919905B2/ja
Priority to US13/794,704 priority patent/US8970121B2/en
Publication of JP2013192309A publication Critical patent/JP2013192309A/ja
Publication of JP2013192309A5 publication Critical patent/JP2013192309A5/ja
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/392—Switched mode power supply [SMPS] wherein the LEDs are placed as freewheeling diodes at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Dc-Dc Converters (AREA)
  • Led Devices (AREA)
JP2012055371A 2012-03-13 2012-03-13 駆動装置、発光装置及び投影装置 Active JP5919905B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012055371A JP5919905B2 (ja) 2012-03-13 2012-03-13 駆動装置、発光装置及び投影装置
US13/794,704 US8970121B2 (en) 2012-03-13 2013-03-11 Driving device, light-emitting device and projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012055371A JP5919905B2 (ja) 2012-03-13 2012-03-13 駆動装置、発光装置及び投影装置

Publications (3)

Publication Number Publication Date
JP2013192309A JP2013192309A (ja) 2013-09-26
JP2013192309A5 JP2013192309A5 (enExample) 2014-10-30
JP5919905B2 true JP5919905B2 (ja) 2016-05-18

Family

ID=49156999

Family Applications (1)

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JP2012055371A Active JP5919905B2 (ja) 2012-03-13 2012-03-13 駆動装置、発光装置及び投影装置

Country Status (2)

Country Link
US (1) US8970121B2 (enExample)
JP (1) JP5919905B2 (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107834689B (zh) * 2012-06-07 2021-09-14 昕诺飞控股有限公司 用于应急照明的系统和方法
CN104717784B (zh) * 2013-12-13 2018-09-14 台达电子企业管理（上海）有限公司 光源驱动电路
US10395590B1 (en) 2015-09-18 2019-08-27 Apple Inc. Hybrid microdriver architecture for driving microLED displays
US10395594B1 (en) * 2015-09-18 2019-08-27 Apple Inc. Hybrid microdriver and TFT architecture
US10395589B1 (en) 2015-09-18 2019-08-27 Apple Inc. Hybrid microdriver architectures having relaxed comparator requirements
US12439490B2 (en) 2021-05-28 2025-10-07 Signify Holding B.V. Driver for driving a load, such as a LED load
JP2025073692A (ja) * 2023-10-27 2025-05-13 大光電機株式会社 Ｌｅｄ照明用電源装置及びｌｅｄ照明装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004311635A (ja) 2003-04-04 2004-11-04 Olympus Corp 駆動装置及びそれを用いた照明装置、並びに、その照明装置を用いた表示装置
JP4306657B2 (ja) * 2004-10-14 2009-08-05 ソニー株式会社 発光素子駆動装置および表示装置
JP4595867B2 (ja) 2006-03-31 2010-12-08 カシオ計算機株式会社 発光素子の駆動装置、発光素子の駆動方法及びプロジェクタ
JP5569232B2 (ja) * 2010-08-03 2014-08-13 株式会社ニコン 発光素子駆動回路、表示装置
JP5182400B2 (ja) * 2010-08-24 2013-04-17 カシオ計算機株式会社 半導体光源装置及び半導体光源制御方法

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Publication number Publication date
JP2013192309A (ja) 2013-09-26
US8970121B2 (en) 2015-03-03
US20130241438A1 (en) 2013-09-19

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